165512655 has 96 divisors (see below), whose sum is σ = 367630848. Its totient is φ = 66873600.

The previous prime is 165512651. The next prime is 165512717. The reversal of 165512655 is 556215561.

It is not a de Polignac number, because 165512655 - 2² = 165512651 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165512651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 127560 + ... + 128850.

It is an arithmetic number, because the mean of its divisors is an integer number (3829488).

Almost surely, 2^165512655 is an apocalyptic number.

165512655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

165512655 is an abundant number, since it is smaller than the sum of its proper divisors (202118193).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

165512655 is a wasteful number, since it uses less digits than its factorization.

165512655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1357 (or 1354 counting only the distinct ones).

The product of its digits is 45000, while the sum is 36.

The square root of 165512655 is about 12865.1721714091. The cubic root of 165512655 is about 549.0481110853.

The spelling of 165512655 in words is "one hundred sixty-five million, five hundred twelve thousand, six hundred fifty-five".